Intro to Millwright Practice Exam 2025 – Comprehensive All-In-One Guide for Exam Success!

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What is the term for the bottom surface joining adjacent sides or flanks of a thread?

Root

The term for the bottom surface joining adjacent sides or flanks of a thread is the root. In the context of threads, the root is the surface where the two flanks meet and is critical in determining the dimensions and effective engagement of threaded components. Understanding this term is essential, as it helps in the design and manufacturing of screws, bolts, and other fasteners, ensuring that the threads fit securely and perform their intended function effectively. The root contributes to the overall integrity of the threaded connection, impacting factors such as strength and load distribution.

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Flank

Crest

Shoulder

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